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Some random data: The typical Brown and yellow pattern on Eyeglasses named havana or tortoise its an imitation of the shell of some species of tortoises that were hunted from centuries for making eyeglasses, combs etc. the substitute in acetate was cheaper because the tortoises populations were largely reduced and the original tortoise shell cost was prohibitive. Real tortoise shell was used into beginings of 1900s when it fall out of use.

trabajo para la óptica mas visión y estoy aquí porque me dió curiosidad que es el acetato de los armazones que vendo

Super nice video, i love it, and it's just nice to see how the plates are made

Este proceso evita matanza de tortugas

Supa schöne Brille und sehr gut zu tragen.

Excellent video - very relevant to stuff I'm doing, gave me some good ideas. Thanks for posting, Johann.

Nice video, Thank you, Also Visit: bit.ly/2zI7Gjr Cellulose acetate is a synthetic compound originated from the acetylation of the plant substance cellulose. Cellulose acetate is further turned into textile fibres which is known as acetate rayon, acetate, or triacetate. This acetate can also be moulded into solid plastic parts such as tool handles or cast into film for photography or food wrapping.

very nice job

Yo le sang